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Internal Structure of the Heart

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Background Information

The heart primarily consists of four hollow chambers. There are two upper chambers called atria and two lower chambers called ventricles. Large veins carry blood into the atria from all parts of the body. The blood then passes into the ventricles and is ejected into large arteries that carry the blood away from the heart. Blood moves through the heart due to pressure differences and heart valves regulate the movement.

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Structure Identification:
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Structure Identification:
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Terms of Use

Terms of Use

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